At the KBaum website you can find a nice and simple Flash puzzle game called Dupligon which looks like memory (also known as Concentration, Pelmanism or simply Pairs).

In Dupligon there are two boxes, in the left box you will see a shape which you’ll have to remember and you’ll have to redraw the shape in the right box by moving and clicking your mouse. You get a points for each attempt, size and position don’t matter, only the angles do. There are four levels with each five puzzles to complete. Enjoy this simple but addictive puzzle game.